---
title: "FoxESS ECS2900-H5 vs Pylontech Force H2 (FH9637M) - Battery Comparison | ComparePV"
description: "Compare FoxESS ECS2900-H5 vs Pylontech Force H2 (FH9637M) side by side: shop prices, usable energy, round-trip efficiency, power, cycle life and the full specification."
source: "https://comparepv.com/compare-batteries/fox-ess-ecs2900-h5/pylontech-force-h2-fh9637m"
updated: 2026-01-11
---

# FoxESS ECS2900-H5 vs Pylontech Force H2 (FH9637M)

10 differences, and they point both ways

The largest is usable energy: 0.17 kWh apart. 6 of 16 comparable parameters are identical, with 17 more left out because at least one datasheet does not publish them.


## The two batteries


| Attribute | A | B |
| --- | --- | --- |
| Battery | [FoxESS ECS2900-H5](https://comparepv.com/battery/fox-ess-ecs2900-h5) | [Pylontech Force H2 (FH9637M)](https://comparepv.com/battery/pylontech-force-h2-fh9637m) |
| Manufacturer | FoxESS | Pylontech |
| Usable energy | 12.96 kWh | 12.79 kWh |
| Cells and voltage | LFP HV | HV |


## Price offers


| Shop | Country | ECS2900-H5 | Force H2 (FH9637M) |
| --- | --- | --- | --- |
| www.hlumar.sk | Slovakia |  | 2 158 € |
| www.alma-solarshop.be | Belgium |  | 3 765 € |
| www.alma-solarshop.nl | Netherlands |  | 3 765 € |
| Solaris Energy | Poland |  | 21 170 zł |

[See 21 FoxESS offers](https://comparepv.com/offers?manufacturer=foxess&product_type=battery)

[See 102 Pylontech offers](https://comparepv.com/offers?manufacturer=pylontech&product_type=battery)


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | ECS2900-H5 | Force H2 (FH9637M) | Difference |
| --- | --- | --- | --- |
| Usable energy | 12.96 kWh | 12.79 kWh | 0.17 kWh apart |
| Nominal voltage | 288 V | 384 V | 96 V apart |
| Weight | 164.3 kg | 155.0 kg | -9.3 kg for Force H2 (FH9637M) |
| Min operating temperature | -20 °C | 0 °C | -20 °C for ECS2900-H5 |
| Nominal energy | 14.40 kWh | 14.21 kWh | 0.19 kWh apart |
| Max operating temperature | 55 °C | 50 °C | +5 °C for ECS2900-H5 |
| Weight per kWh | 12.7 kg/kWh | 12.1 kg/kWh | -0.6 kg/kWh for Force H2 (FH9637M) |
| Ingress protection | IP65 | IP55 | IP65 vs IP55 |
| Operating voltage | 243-328.5 V | 96-384 V | 243-328.5 V vs 96-384 V |
| Dimensions | 710x570x380 mm | 1415x450x296 mm | 710x570x380 mm vs 1415x450x296 mm |


## Every compared parameter


| Parameter | ECS2900-H5 | Force H2 (FH9637M) |
| --- | --- | --- |
| Usable energy | 12.96 kWh | 12.79 kWh |
| Nominal energy | 14.40 kWh | 14.21 kWh |
| Depth of discharge | 90 % | 90 % |
| Max system capacity | 20.2 kWh | - |
| Modules per stack | 2-7 | 2-7 |
| Continuous discharge power | - | - |
| Continuous charge power | - | - |
| Peak discharge power | - | - |
| Power per kWh | - | - |
| Round-trip efficiency | 95.0 % | - |
| Cycle life | 6000 cycles | - |
| Cycle test depth | 90 % | 90 % |
| Capacity at end of life | - | - |
| Self-discharge | - | - |
| Voltage class | High voltage | High voltage |
| Nominal voltage | 288 V | 384 V |
| Operating voltage | 243-328.5 V | 96-384 V |
| Cell chemistry | LFP | - |
| Active cell balancing | - | - |
| Thermal management | - | - |
| Inverter | None (battery only) | None (battery only) |
| Inverter power | - | - |
| Grid connection | - | - |
| Backup power | - | - |
| Weight | 164.3 kg | 155.0 kg |
| Weight per kWh | 12.7 kg/kWh | 12.1 kg/kWh |
| Dimensions | 710x570x380 mm | 1415x450x296 mm |
| Ingress protection | IP65 | IP55 |
| Outdoor-rated | Yes | Yes |
| Min operating temperature | -20 °C | 0 °C |
| Max operating temperature | 55 °C | 50 °C |
| Warranty | - | - |
| Warranted throughput | - | - |


## Related comparisons

- [FoxESS ECS2900-H5 vs BYD Battery-Box Premium HVS 12.8](https://comparepv.com/compare-batteries/fox-ess-ecs2900-h5/byd-battery-box-premium-hvs-12-8) - 15 differences, the largest is usable energy
- [FoxESS ECS2900-H5 vs SMA Home Storage 13.1](https://comparepv.com/compare-batteries/fox-ess-ecs2900-h5/sma-solar-technology-ag-sma-home-storage-13-1) - 14 differences, the largest is cycle life
- [FoxESS ECS2900-H5 vs BYD Battery-Box Premium HVM 13.8](https://comparepv.com/compare-batteries/fox-ess-ecs2900-h5/byd-battery-box-premium-hvm-13-8) - 9 differences, the largest is usable energy
- [Pylontech Force H2 (FH9637M) vs FoxESS HS12.5](https://comparepv.com/compare-batteries/pylontech-force-h2-fh9637m/foxess-hs12-5) - 9 differences, the largest is usable energy


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Source: https://comparepv.com/compare-batteries/fox-ess-ecs2900-h5/pylontech-force-h2-fh9637m

Not in this file, on the page: a written summary generated on request.